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v4.21.0

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@rodrigoslayertech rodrigoslayertech released this 18 Jul 04:12
· 31 commits to main since this release
v4.21.0
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rodrigoslayertech Rodrigo Vieira
GPG key ID: 37792D85F05A69BA
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Learn about vigilant mode.
3385c26
This commit was signed with the committer’s verified signature.
rodrigoslayertech Rodrigo Vieira
GPG key ID: 37792D85F05A69BA
Verified
Learn about vigilant mode.

Focus: Content-first mobile delivery — about 1s faster FCP/LCP on slow connections for SSR builds.

Changes

  • 📱 Content-first mobile delivery: SSR-prerendered pages no longer emit any JS modulepreload link (22 per page before) and the entry module is fetched with fetchpriority=low — the render-blocking CSS now owns slow links, since the first paint ships as server-rendered HTML and needs no JavaScript
  • 🔤 Font preloads slimmed to the latin subset only, at fetchpriority=low — latin-ext glyphs still load on demand via unicode-range
  • ⚡ Early Hints are now stylesheet-only and finally include the bundler's main CSS (the previous quote-sensitive regex missed minified attributes)
  • 🐢 Below-the-fold code blocks and tables lazy-render on phones via content-visibility: auto (anchors, find-in-page and scroll integrity verified; prose stays eager to keep scroll anchoring stable)
  • 🔕 The SPA-era route-preload plugin stays quiet in SSR builds (its modulepreloads are counterproductive there)
  • ✅ Validated on slow-4G emulation with median-of-3 Lighthouse runs: mobile score 69 → 81 (home) and 87 (guide page), FCP −990ms, LCP −908ms, CLS unchanged; 335 tests passing
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